Is skyjacking a mere DoS threat against Cisco WLAN?

Posted by Pravin on Aug 26, 2009 9:11:09 AM

Skyjacking vulnerability which allows Cisco LAP to be diverted to connect to rogue controller by manipulating OTAP could be more dangerous than what has been clarified by Cisco in its advisory. The advisory says that “An exploit could prevent the device from functioning properly, resulting in a DoS condition. There is no risk of data loss or interception by the rogue access point or Wireless LAN Controller.”

As a matter of fact, it should be possible to convert Authorized Cisco LAP into a wired rogue AP using skyjacking. After Cisco LAP is trapped into skyjacking (for example, made to connect to a controller hosted on the net), it is possible to convert it to Cisco REAP mode and make it bridge traffic locally between Enterprise wired subnet and wireless.

Just a thought – won’t blocking LWAPP discovery port on enterprise firewall protect you from this threat?

Stay tuned for more updates as we dig deeper into this.

Topics: Wireless security


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